| Approach
2: Bank Account Mechanism |
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| • | Each
manager has a bank. |
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| • | Each
bank has an account for each service class. |
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| • | In
the account is the # of tickets saved and when they are |
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| deposited. |
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| • | Depositing,
drawing, and transferring tickets together are |
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| used
to achieve both performance isolation and resource |
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| utilization. |
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